随记WeekTreat

 
 public WeekTreat(){
  
 }
 
 /*
  * 返回当前周7天 每天日期
  * nowdat 今天日期 格式 yyyy-MM-dd
  * jumpnum 步进时间  0 本周, 1下周,-1 上周
  *
  * @return  星期数组
  */
 public String[] getThisWeek(String nowdat,int jumpnum){
  
  String[] weekArry = new String[7];
  for(int i=0;i<7;i++){
   weekArry[i] = "";
  }
  
  SimpleDateFormat df=new SimpleDateFormat("yyyy-MM-dd");
  Calendar cal = Calendar.getInstance();
 
  cal.set(cal.DAY_OF_WEEK, Calendar.MONDAY); 
  
  Date date = new Date();
   try {
    date = df.parse(nowdat);
   } catch (ParseException e) {
    System.out.println("初始时间错误 : "+e.toString());
   }
  cal.setTime(date);
  cal.add(Calendar.DATE, jumpnum);
  //System.out.println("处理时间:"+df.format(cal.getTime()));
  
     int   k=date.getDay();    //今天周几
    
     if (k==0){k=7;}      //设置周日 为上周

  for(int i=0;i<7;i++){
    int step = i+Integer.parseInt(""+((k-1)*-1));
    Calendar cal2 = Calendar.getInstance();
        
    cal2.setTime(date);
       cal2.add(Calendar.DATE,step+jumpnum);
       String weeki = df.format(cal2.getTime());
       weekArry[i] = weeki;   
   }
  
  return weekArry;
  }
 
 
 /*
  * 返回当前日期 周几
  * nowdat 今天日期 格式 yyyy-MM-dd
  * @return  星期数
  */
 public int dayForWeek(String pTime) {
  
  SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
  Calendar c = Calendar.getInstance();
  try {
   c.setTime(format.parse(pTime));
  } catch (ParseException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
   System.out.println("dayForWeek 初始时间错误 : "+e.toString());
  }
  int dayForWeek = 0;
  if (c.get(Calendar.DAY_OF_WEEK) == 1) {
   dayForWeek = 7;
  } else {
   dayForWeek = c.get(Calendar.DAY_OF_WEEK) - 1;
  }
  return dayForWeek;
 }